Square



March 30, 1943. w. a PMN-1ER 2,315,004

SQUARE Filed Jan. 19, 1942 I NV ENTOR.

www m Patented Mar. 30, 1943 UNITED STATES yPATENT `OFFICE SQUARE William. Painter, Dearborn, Mich. Application January 19', 1,942, Serial No. 427,371

(Cl. {i3-112) Claims.

This invention relates generally to squares for laying out or testing square work and refers more particularly to an improved square suitable for any mechanical work where a square could be used.

One of the essential objects of the invention is to provide a solid one-piece square -of the type mentioned that is easy and inexpensive to manufacture, strong and durable, and easy to regrind.

Another object is to provide a square having a multiple edge formation for squaring purposes, preferably four edges that can 4be used as desired.

Another object is to provide a square wherein one or more of the squaring edges is or `are ground on a radius to provide the finest possible squaring edge.

Another object is to provide a square wherein one or more of the squaring edges is or are ground flush with the adjacent side of the base.

Another object is to provide a square 'wherein the base thereof is of sufficient size and thickness to counterbalance the arm of the square when the latter is extended over an edge for squaring purposes.

Another object is to provide a square wherein the distance between the radius-ground edges of the inner and outer1 squaring edges is greater than the distance between the squaring edges at opposite sides of the square so that said inner and outer squaring edges may be radius-ground without the grinder touching or marring the side edges mentioned.

Other objects, advantages and novel details Y of construction of this invention will be made more apparent as this descriptionproceedsespecially when considered in connection with the accompanying drawing, wherein:

Figure l is a side elevation of a square embodying my invention;

Figure 2 is an end view thereof;

Figure 3 is a sectional view taken en the line 33 of Figure 1;

Figure 4 is a sectional view taken on the line l-4 of Figure l; and

Figure 5 is a top plan view of the square.

Referring now to the drawing, A is the base and B is the arm of a square embodying my invention.

As shown, the base A and arm B are formed from one piece of metal, preferably machine steel, and are disposed at right angles to each other. Preferably the base A is relatively thick and heavy and is substantially square-shape in cross section, while the arm B is smaller and lighter and is provided throughout its length with longitudinally extending flutes III separated one from another by narrow fillets II, I2, I3 and I4, respectively. The lower and top fillets Il and I2 are ground on a common radius and, therefore, have curved or rounded edges I5 and i6, respectively, whichprovlde the finest possible squaring edges, while the intermediate fillets I3 and i4 have flat edges VI1 and I8, respectively, flush with and constituting continuations of opposite sides vI9 and 20, respectively, of `the base A. The distance between the 'edges I5 and I6 of the lower and top fillets is greater than the distance between the edges `II and I8 of the intermediate fillets t3 and I4 so that the edges of said lower and top fillets may `be ground and regroundwithout the grinder touching the edges of the intermediate fillets. Preferably the flutes IIl upon Vopposite sides of the fillet I2 continue across the adjacent end of the base A as at I0' from the inner to the outer faces 2l and 22, respectively, Ythereof so that the fillet I2' cooperates with the fillet I2 Vto provide a continuous and uninterrupted squaring edge at the top of the square from ythe outer end 23 of the arm to the outer face r22 of the base A. Likewise, the edges I1 and I8, respectively, of the intermedlate'llets I3 and I4 cooperate with the opposite sides I9 and 20 of the base to provide continuous and uninterrupted squaring edges at opposite sides of the square `from the outer` end 23 of the Varm to the outer face 22 of the base A. The lower and top fillets II and I2 are disposed at angles to the intermediate fillets I3 and I4 which, as just stated, are flush with the opposite sides of the base A; hence, the square is usable under various circumstances for laying out or testing square work. For example, the base A may be "slid into a space between two uprights so that the fillets I3 and I4 of the arm B could be used with the base for squaring purposes, or the base A may be slid or extended over an edge of an object Vso that one or more fillets of the arm B may be vused against an upright edge or surface of an object spaced from the first mentioned object, in which event the heavy base A on the first mentioned object serves to counterbalance the arm B. Thus, it is apparent Vthat the square has a multiple edge formation for squaring pur-poses. Such a square can be resquared quickly in any modern tool room and, therefore, docs not require factory service. Moreover, it can be accurately made in a variety of sizes.

What I claim as my invention is:

l. A square of the class described having a base and an arm Vdisposed at right angles to each other, the base being substantially square-shape in cross section, the arm being provided throughout its length with four longitudinally extending flutes separated one from another by narrow fillets, two of said fillets having fiat edges flush with opposite faces or sides of said base, the other two fillets being between and disposed at 90 to the first mentioned fillets, the edges of the last mentioned fillets being spaced apart a distance greater than the distance between the flat edges of the first mentioned fillets so thatI the said last mentioned fillets may be reground on a radius without the grinder touching or marring the flat edges of the first mentioned fillets.

2. A one piece square of the class described having a base and an arm disposed at right angles to each other, the base `being substantially rectangular in configuration, the arm being provided throughout its length with circumferentially spaced longitudinally extending transversely curved flutes separated one from another by fillets of substantially V cross section, the fillets at the top and bottom of said arm being ground on a common radius so as to have transversely curved or rounded edges, the fillets at opposite sides of said arm intermediate the iilletsaforesaid having flat edges flush with and constituting continuations of opposite sides of the base, the diametric dimension between the rounded edges of the top and bottom fillets being greater than the distance between the fiat edges of the intermediate llets so that said rounded edges may be ground and reground without the grinder contacting or touching the flat edges or the intermediate fillets, opposite sides of the base being provided `from the outer face of the base to the inner end of the arm with transversely extending fiutes similar in configuration to the Iiutes in said arm and separated from each other by a transversely extending fillet similar in cross section to the top fillet of the arm, the flutes in the base being in alignment with and constituting endwise continuations of the uppermost flutes at opposite sides of the arm, so that the lower side edges of the flutes just mentioned in the base and arm collectively provide continuous and uninterrupted squaring edges along the iiush edges and sides respectively of the intermediate fillets and base at opposite sides of the square from the outer end of said arm to the ofuter face of the base, and the fillet of the base and the tcp iillet of ythe arm being in alignment and collectively providing a continuous and uninterrupted squaring edge at the top of the square from the outer end of the arm to the outer face of the base.

3. A solid jointless square of the class described having a base and an arm disposed at right angles to each other, the base being substantially rectangular in configuration, the arm being provided throughout its length with circumferentially spaced longitudinally extending transversely curved flutes separated one from another by fillets of substantially V cross section, the fillets at opposite sides of said arm intermediate the fillets aforesaid having flat edges flush with and constituting continuations of opposite sides of the base, the diametric dimension between the rounded edges of the top and bottom fillets being greater than the distance between the fiat edges of the intermediate fillets so that said rounded edges may be ground and reground Without the grinder contacting or touching the fiat edges of the intermediate fillets, opposite sides of the base being provided from the outer face of the base to the inner end of the arm with transversely extending flutes similar in configuration to the flutes in said arm and separated from each other by a transversely extending flllet similar in cross section to the top llet of the arm, the flutes in the base being in alignment with and constituting endwise continuations of the uppermost flutes at opposite sides of the arm, so that the lower side edges of the flutes just mentioned in the base and arm collectively provide continuous and uninterrupted squaring edges along the flush edges and sides respectively of the intermediate fillets and base at opposite sides of the square from the outer end of said arm to the outer face of the base, and the llet of the base and the top fillet of the arm being in alignment and collectively providing a continuous and uninterrupted squaring edge at the top of the square from the outer end of the arm to the outer face of the base.

4. A jointless square of the class described having a base and an arm disposed at right angles to each other, the base `being substantially rectanguiar in configuration, the arm being provided throughout its length with circumferentially spaced longitudinally extending transversely curved flutes separated one from another by fillets of substantially V cross section, the fillets at the top and bottom of said arm being ground on a. common radius so as to have transversely curved or rounded edges, the fillets at opposite sides of said arm intermediate the fillets aforesaid having i'iat edges flush with and constituting continuations of opposite sides of the base, opposite sides of the base being provided from the outer face of the base to the inner end of the arm with transversely extending flutes similar in configuration to the flutes in said arm and separated lfrom each other by a transversely extending fillet similar in cross section to the top fillet of the arm, the flutes in the base being in alignment with and constituting endwise continuations of the uppermost iiutes at opposite sides of the arm, so that the lower side edges of the flutes just mentioned in the base and arm collectively provide continuous and uninterrupted squaring edges along the flush edges and sides respectively of the intermediate llets and base at opposite sides of the square from the outer end of said arm to the outer face of the base and the llet of the base and the top fillet of the arm being in alignment and collectively providing a continuous and uninterrupted squaring edge at the top of the square from the outer end of the arm to the outer face of the base.

5. A jointless square of the class described having a base and an arm disposed at right angles to each other, the base being substantially rectangular in configuration, the arm being provided throughout its length with circumferentially spaced longitudinally extending transversely curved flutes separated one from another `by lillets of substantially V cross section, the llets at the top and bottom of said arm being ground on a common radius so as to have transversely curved or rounded edges, the fillets at opposite sides of said arm intermediate the fillets aforesaid having flat edges flush with and constituting ccntinuations of opposite sides of the base, the diametric dimension between the rounded edges of the top and bottom iillets being greater than the distance between the flat edges of the intermediate flllets so that said rounded edges may be ground and reground without the grinder contacting or touching the flat edges of the intermediate fillets.

WILLIAM B. PAINTER. 

